Loudspeaker



FIG. 1 is a right side perspective view of a loudspeaker showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a top view thereof; and,

FIG. 5 is a bottom view thereof. 

I claim the ornamental design for a loudspeaker, substantially as shown and described. 